<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>标题</title>
</head>
<body>
<h1>Hello World</h1>
<h1>你好，开发喵</h1>

<form action="" method="get">
    <input type="text" name="username" />
    <input type="password" name="password"/>
    <button>按钮</button>
</form>
</body>
</html>